(XP embedded PC)
I am trying to monitor and set various digital inputs and outputs within an electromechanical machine.
I am at present, using 8 port digital input output boards connected together via an RS485 link.
I have around 60 outputs and 30 inputs which I wish to set and monitor within a short space of time. (around 5mS)
My problem is that the serial data transmission and consequent reception from each board takes far too long. I know I could attach a GPIO device to my PC (XP embedded) and instantly send and receive, but I wish to use some sort of shift register system (similar to boundary scan devices).
Is there any such animal commmercially available?